malloc/tst-mcheck.c

   1 /* Copyright (C) 2005-2013 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 static int errors = 0;
  24
  25 static void
  26 merror (const char *msg)
  27 {
  28   ++errors;
  29   printf ("Error: %s\n", msg);
  30 }
  31
  32 int
  33 main (void)
  34 {
  35   void *p, *q;
  36
  37   errno = 0;
  38
  39   p = malloc (-1);
  40
  41   if (p != NULL)
  42     merror ("malloc (-1) succeeded.");
  43   else if (errno != ENOMEM)
  44     merror ("errno is not set correctly.");
  45
  46   p = malloc (10);
  47   if (p == NULL)
  48     merror ("malloc (10) failed.");
  49
  50   p = realloc (p, 0);
  51   if (p != NULL)
  52     merror ("realloc (p, 0) failed.");
  53
  54   p = malloc (0);
  55   if (p == NULL)
  56     merror ("malloc (0) failed.");
  57
  58   p = realloc (p, 0);
  59   if (p != NULL)
  60     merror ("realloc (p, 0) failed.");
  61
  62   q = malloc (256);
  63   if (q == NULL)
  64     merror ("malloc (256) failed.");
  65
  66   p = malloc (512);
  67   if (p == NULL)
  68     merror ("malloc (512) failed.");
  69
  70   if (realloc (p, -256) != NULL)
  71     merror ("realloc (p, -256) succeeded.");
  72   else if (errno != ENOMEM)
  73     merror ("errno is not set correctly.");
  74
  75   free (p);
  76
  77   p = malloc (512);
  78   if (p == NULL)
  79     merror ("malloc (512) failed.");
  80
  81   if (realloc (p, -1) != NULL)
  82     merror ("realloc (p, -1) succeeded.");
  83   else if (errno != ENOMEM)
  84     merror ("errno is not set correctly.");
  85
  86   free (p);
  87   free (q);
  88
  89   return errors != 0;
  90 }